11.24: Two wave pulses travel to the righaviuxm(l n5 rh./3e4)thp 89gqo p7zbt toward a rigid boundary as shown. After reflection of the triangular pulse, the pulses will interfere. Which one of the following pictures best represents87e(g aomxi/l).nu45p 9t vzphrhq b3 the superposition of the pulses when the centers of the individual pulses coincide?

  08.30: A light beam passes through the air and strikes the su ;k z5;gcqvu *xmiy(ri28hy, drface of a plastic block. Which pair of statements correctly describes the phase changes for the reflected wave and the,y gkz ;q8hi; (xuvmi5y 2dcr* transmitted wave?

  12.02: A ray of light passes straight downward through the point labei 1nqezc;0c7ytuv 0( bled B in the diagrav0c0 ;z1 ce(qtiu7yn bm shown. The ray reaches a flat mirror placed at an angle $\Theta$ to the horizontal as shown. Which one of the locations labeled in the figure best represents the point through which the ray reflected from the mirror will pass?

  00.04: Specular reflection occurs whenever li. kzn4mqho9 j0ght is incident on

  05.18: A student hold a hand mirror to observjhh:6u qi;v o/ef f6kn +c2ub7e the back of her head while standing in front of and looking into a wall mirror. If she is standin6b:qiu2 e ;kuc6 vfof+/ jhh7ng 4 ft in front of the wall mirror and she holds the hand mirror 1 ft behind her head, she will see the back of her head how far behind the wall mirror?

  14.25: It is observed tha;y/snzz8c j4n t a light ray changes direction when it enters a new material. Which one of the following choices is the term best assocs/84yzzjn ;cniated with this phenomenon?

  96.19: Light that has wavelength of 500 nm in air has wavelength 400 nm i rjso1f7q-. 2go.a kjin a transparent material. What is the index of refractiias .goj- 7of2kqj. r1on of the material?

  98.04: As sound travels from steel into air, both its speed *vy,0 +n cbwl9ymfs u+u7zn; wand its:

  00.01: As a wave moves from one mxf8 lwhvdt*nirsae* +95(7 b redium to a second medium with a different index of refracti(i*wrs fa7+ b5*le9r8v dxhnton which of the following wave properties would NEVER change?

  05.47: A sound wave gj5zt*a pht* ;ietiy 71hi i:8fenerated from a tuning fork of single frequency travels from air (with speed of sound 340 m/s) into rock (with speed of sound 1500 m/s). Which statement is true about the wavelength and frequ :he8 ht*i5*f1ypii;a 7itj ztency of the sound as it passes from air to rock?

  14.28: A waterproof speaker placei1 jpl g9.rolwfh v p3(c)h-9nd at the bottom of a swimming pool emits a sound wave that travels toward the surface of the wat vh1 l9g-rh3winp cfj. pl(9o)er. In the water, the sound wave has a frequency $f_{water}$, wavelength $\lambda_{water}$ , and wave speed $v_{water}$ . When the sound wave enters the air it has a frequency $f_{air}$ ,wavelength $\lambda_{air}$, and wave speed $v_{air}$ . Which one of the following relationships correctly compares the frequencies, wavelengths, and wave speeds of the waves in the air and water?

  02.33: A short burst of white li x up(dm/vfb/(ght strikes a rectangular glass block with an angle of in(m/p/vf (dbx ucidence of $0^0$. Which color of transmitted light would be the first to emerge from the opposite side?

  96.02: A beam of light is directed toward a point P onft ,e v4mvb34y7x ;jo+glt 2zn a boundary as shown to the right. Which segmno3v4yftbve t7 ,+2g;l jz4mxent best represents the refracted ray?

  98.17: Which diagram best represent/ a u*jcr4gsj5z/zxa 0s what happens to a ray of light entering air froz4cjgjur5 *x0 as/az /m water? Air is at the top in all diagrams.

  94.11: The critical angle of a material is them hh/o85c j*ux angle of incidence for which the angle of x 85mh *hc/ujorefraction is:

  95.12: The principle undmbrw+nzbntt-(,qr x*p1a )s 3fz s(h-erlying fiber optics is:

  98.36: The critical angle in a transparent substance surrounded by air iue 1hepc:2l5bs $30^{\circ}$. The speed of light in
the substance (in multiples of $10^8$ m/s) is most nearly

  01.28: Light travels from matenl3(tw:meis 1ne m y:(rial X with an index of refraction of n = 1.5 to material Y with an index of refraction of n = 2.0. If the speed of light in material Y is v, what is the speed of light in materiayel nmsen(m(wt : i1:3l X?

  03.15: A jeweler can distinguish between a diamond and a piezrowmv...y71bxq r tgr5m3i 15vk zy)ce of glass by observing the critical angle of the lightyw zzxr1omiq m5vt35.brkv. )g1r.y 7 in each material. Glass with an index of refraction of 1.52 has a critical angle of $41.1^{\circ}$ while a diamond with an index of refraction of 2.42 would have a critical angle of:

  05.26: Light shines from air into a clhfe6h+wg6(kn oj3d:h ear material. When the light makes an angle of incidence hwd(o+j :h6gnk3e 6fhequal to $30.0^{\circ}$, the light refracts at an angle of 1$5.0^{\circ}$. If the light is shone from an angle of incidence of $60.0^{\circ}$, what is the angle of refraction?

  95.40: A Metrologic laser is ,:gwdqp :v6tdembedded in a material of index of refraction n. The laser beam emerges from the material and hits a q twdd,6:pv:gtarget. See the accompanying figure for the position parameters of the laser and target. The value of n is:

  95.31: A beam of light passes from medium 1 to medium 2 to medium 3 as vub.f avra4qa/rnan ;q1-8 vv6,d qnrsd*+8eshown in the accompanying figure. What is true abou,8 4v vn.bndr6 r qedaqfnu;/aqas r-+8*1vavt the respective indices of refraction (n1, n2, and n3)?

  00.14: A beam of light passes from medium 1 to medium 2 to medium do/2zg(nix,w9ovrt r , udj.53 as shown in the diagram. What may be concluded about the three indexes of refraction, n1, n2 2dgx,(./n 5t, jruozo 9vwrdiand n3?

  97.24: The accompanying diagram shows the path that a li3yi:k32z v:a( xoba qwght ray takes passing through three transparent materials. Thq a(zby :ix:3kvoa w32e indices of refraction in materials 1, 2, and 3 are n1, n2, and n3, respectively. Which of the following best describes the relation between the indices of refraction?

  09.34: The diagram belo 0(sfsnrs9uzpp) qm07w shows the path taken by a monochromatic light ray traveling through three media.The symbo(mpfpqzu97 ss0 )r0 nsls $v_1$,$\lambda_1$ , and $f_1$ represent the speed, wavelength, and frequency of the light in Medium 1, respectively. Which of the following relationships for the light in the three media is true?

  99.26: A beam of lightgr5.d92d uq tt;e oxl1 traveling in glass ($n_g$=1.5) strikes a boundary with air ($n_a$ =1.0) at point P.The angle
of incidence is $60^{\circ}$ as shown in the diagram. Which ray would best indicate the beam’s path after point P?

  04.35: A ray of light is incident on the surface of a r.z9smz3hy z q(ectangular block of glass at an angle oyq z9.3(hzsmz f $45^{\circ}$. It refracts into the glass and then strikes the side of the block as shown in the diagram. What would be the most likely path of the light after striking the side of the glass block?

  13.27: Light of wavelength 600nm is transmitted from air into a piece of v.ht 6 cufop/d7e89o0ro5z slglass. Which one of the labeled arrows best indicates the path of the 7 d .hlt9op f5zo/ue8 s6oc0vrlight ray after it enters the glass?

  14.44: A ray of monochromatr:xurwuki7,i nb wm, 2;u 4q9*zbj(stic light enters the right-triangular glass as shown. The glass has an index of refraction of 2.00 and it is surrounded by air. Which one of the lettered rays shows the path of the light afte(,zbujr2m4ikq9;wrsx u,w :7tui*b nr it exits the glass?